<?php
/************
*
*????subPage.class.php
*????分頁類
*
*************/
class?SubPage{
????private?$sizeInPage;//每頁顯示多少條記錄
????private?$totalRecord;//總共多少條記錄
????private?$totalPage;//總共多少頁
????private?$currentPage;//當前頁
????private?$startIndex;//開始索引
????private?$offset;//偏移數

????private?$firstPage;//首頁
????private?$endPage;//尾頁
????private?$next;//下一頁
????private?$last;//上一頁
????private?$subPage_arr;//分頁數組
????private?$subPage_count;//分頁數組顯示的個數
????private?$resultSet;//結果集


????/*
????*????@function?構造方法
????*????@param????$size_in_page每頁顯示記錄數,$current_page當前頁,$toatal_record總記錄數,$subPage_count分頁列數組顯示的個數
????*????@return?
????*/
????public?function?__construct($size_in_page,$current_page,$total_record,$subPage_count){
????????//$this->initPageArr($page_count);
????????$this->init($size_in_page,$current_page,$total_record,$subPage_count);
????????$this->setTotalPage();
????????$this->setStartIndex();
????????$this->setOffset();
????????if($this->is_SubPage()){
????????????//有分頁的情況
????????????$this->setSubPageArr();
????????}
????????else{
????????????//沒有分頁的情況
????????????$this->subPage_arr=array();
????????}
????}
????
????/*
????*????@function?初始化對象屬性
????*????@param????$size_in_page每頁顯示記錄數,$current_page當前頁,$toatal_record總記錄數
????*????@return????none
????*/
????public?function?init($size_in_page,$current_page,$total_record,$subPage_count){
????????$this->sizeInPage=$size_in_page;
????????$this->currentPage=$current_page;
????????$this->totalRecord=$total_record;
????????$this->subPage_count=$subPage_count;
????}
????
????/*
????*????@function?設定總頁數?
????*/
????public?function?setTotalPage(){
????????$this->totalPage=ceil($this->totalRecord/$this->sizeInPage);
????}
????
????/*
????*????@function?設定開始索引
????*/
????public?function?setStartIndex(){
????????$this->startIndex=($this->currentPage-1)*$this->sizeInPage;
????}
????
????/*
????*????@function?設定偏移量
????*/
????public?function?setOffset(){
????????$this->offset=$this->sizeInPage;
????}
????
????/*
????*????@function?設定首頁的頁數
????*/
????public?function?setFirstPage(){
????????$this->firstPage=1;
????}

????/*
????*????@function?設定尾頁的頁數
????*/
????public?function?setEndPage(){
????????$this->endPage=$this->totalPage;
????}
????
????/*
????*????@function?設定下一頁的頁數
????*/
????public?function?setNext(){
????????$tmp_next=$this->currentPage+1;
????????if($tmp_next>$this->totalPage){
????????????$tmp_next=$this->totalPage;
????????}
????????$this->next=$tmp_next;
????}
????
????/*
????*????@function?設定上一頁的頁數
????*/
????public?function?setLast(){
????????$tmp_last=$this->currentPage-1;
????????if($tmp_last<1){
????????????$tmp_last=1;
????????}
????????$this->last=$tmp_last;
????}

????/*
????*????@function?判斷是否有分頁
????*????@return?boolean?返回true表示有分頁，false表示沒有
????*/
????public?function?is_SubPage(){
????????if($this->totalPage>1){
????????????return?true;
????????}
????????else{
????????????return?false;
????????}
????}
????
????/*
????*????@function?組裝分頁數組
????*????@param?$start開始的頁碼數,$count幾個頁碼數
????*/
????public?function?initSubPageArr($start,$count){
????????$arr=array();
????????for($i=0;$i<$count;$i++,$start++){
????????????$arr[$i]=$start;
????????}
????????$this->subPage_arr=$arr;
????}
????
????/*
????*????@function?檢測數值是否奇數
????*????@param?$num被檢測數
????*????@return?boolean?返回true表示是奇數，返回false表示是偶數
????*/
????public?function?is_odd($num){
????????if($num%2==0){
????????????return?false;
????????}
????????else{
????????????return?true;
????????}
????}
????
????/*
????*????@function?設定分頁數組
????*????@param?none
????*????@return?none
????*/
????public?function?setSubPageArr(){
????????if($this->totalPage<=$this->subPage_count){
????????????//只有一輪數組
????????????$start=1;
????????????$count=$this->totalPage-$start+1;
????????????$this->initSubPageArr($start,$count);
????????}
????????else{
????????????if($this->currentPage<ceil($this->subPage_count/2)){
????????????????//第一輪數組?當前頁小于均分數的情況
????????????????$start=1;
????????????????$count=$this->subPage_count-$start+1;
????????????????$this->initSubPageArr($start,$count);
????????????}
????????????else?if($this->currentPage<=$this->totalPage?&&?$this->currentPage>($this->totalPage-ceil($this->subPage_count/2))){
????????????????//最后一輪數組?當前頁大于總頁數-均分數
????????????????$start=$this->totalPage-$this->subPage_count+1;
????????????????$count=$this->subPage_count;
????????????????$this->initSubPageArr($start,$count);
????????????}
????????????else{
????????????????//其余情況
????????????????if(($this->currentPage%$this->subPage_count)>ceil($this->subPage_count/2)){
????????????????????//點到數組后半部分
????????????????????$rs=$this->is_odd($this->subPage_count);
????????????????????if($rs===true){
????????????????????????//顯示數是奇數
????????????????????????$start=$this->currentPage-floor($this->subPage_count/2);
????????????????????????$count=$this->subPage_count;
????????????????????????$this->initSubPageArr($start,$count);
????????????????????}
????????????????????else{
????????????????????????//顯示數是偶數
????????????????????????$start=$this->currentPage-(($this->subPage_count/2)-1);//因為當前頁數也需要占1個位置
????????????????????????$count=$this->subPage_count;
????????????????????????$this->initSubPageArr($start,$count);
????????????????????}
????????????????}
????????????????else{
????????????????????//點到數組前半部分
????????????????????$rs=$this->is_odd($this->subPage_count);
????????????????????if($rs===true){
????????????????????????//顯示數是奇數
????????????????????????$start=$this->currentPage-floor($this->subPage_count/2);
????????????????????????$count=$this->subPage_count;
????????????????????????$this->initSubPageArr($start,$count);
????????????????????}
????????????????????else{
????????????????????????//顯示數是偶數
????????????????????????$start=$this->currentPage-(($this->subPage_count/2)-1);//因為當前頁數也需要占1個位置
????????????????????????$count=$this->subPage_count;
????????????????????????$this->initSubPageArr($start,$count);
????????????????????}
????????????????}
????????????}
????????}
????}
????
????/*
????*????@function?查看分頁數的效果
????*????@param?none
????*????@return?string?分頁碼效果
????*/
????public?function?showSubPageArr(){
????????$arr=$this->subPage_arr;
????????$str="";
????????foreach($arr?as?$key=>$value){
????????????$str.=$value."_";
????????}
????????$str=rtrim($str,"_");
????????echo?$str;
????}????
}
$subPage=new?SubPage(2,7,19,6);
$subPage->showSubPageArr();
?>

剛寫的一個分頁類，還未進行代碼精簡。各位大大們看看，哪里寫的不對的，希望各位大大，前輩指出。謝謝！本人菜鳥一個虛心求教。